<template>
  <el-container class="homt_container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="Iscollapse ? '64px' :'200px' ">
        <div class="toggel_btn" @click="toggel_btn">
              <i class="el-icon-s-unfold"></i>
         </div>
        <el-menu
          class="el-menu-vertical-demo"
          background-color="#333744"
          text-color="#fff"
          active-text-color="#ffd04b"
          unique-opened
          :collapse="Iscollapse"
          :collapse-transition="false"
          router
          :default-active ="activePath"
          >
          
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id" >
            
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- Icon图标 -->
              <i :class="iconList[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item :index=" '/' + subitem.path + ''" v-for="subitem in item.children" 
            :key="subitem.id" @click="saveNavState('/' + subitem.path)">
              <template slot="title">
                <!-- Icon图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subitem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>

      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由重定向 -->
        <router-view></router-view>
        </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
data(){
  return {
    //左侧菜单数据
    menuList:[],
    iconList:{
       '125':'iconfont icon-users',
       '103':'iconfont icon-tijikongjian',
       '101':'iconfont icon-3702mima',
       '102':'iconfont icon-danju',
       '145':'iconfont icon-baobiao',
    },

    //是否折叠
    Iscollapse:false,
     
    //被激活的链接地址
    activePath:''

    
  }
},

//生命周期函数
  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      // 清空token
      window.sessionStorage.clear();
      this.$router.push("login");
    },

    //获取所有菜单
   async getMenuList(){
    const{data:res} = await this.$http.get('menus')
  // console.log(res)
    if (res.meta.status !== 200) return this.$message.error(res.meat.msg) 
      this.menuList = res.data
       
    },

    //点击切换菜单折叠展开
    toggel_btn(){
      this.Iscollapse = ! this.Iscollapse
    },
    //保存链接的激活状态
    saveNavState(activePath){
        window.sessionStorage.setItem('activePath' , activePath)
        this.activePath = activePath
    }
  },
};
</script>
<style lang="scss" scoped>
.homt_container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      padding-left: 16px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
    border-right:none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.toggel_btn{
  background-color: #4a5064;
    color: #fff;
    font-size: 12px;
    text-align: center;
    line-height: 22px;
    cursor: pointer;
    letter-spacing: .12em;
}
.iconfont{
  margin-right: 10px;
}
</style>
